Electric switch.



NITED STATES PATENT DFFICE. y

JAMES ERL DU v A'L, 0E EoWIE, frEXAs, `Assrcnvon or ONE-HALF To EznA. A.LEE, 0E

EOWIE, TEXAS.

ELECTRIC SWITCH.

To all urhom` it may concern.'

De it known that I, JAMES E. DU'VAL, a citizen of the United States,residing at- `Bowie, in the county of Montague and State ot' Texas,-have invented certain new and useful Improvements in Electric Switches;and i do hereby `declare the following to be affidi, clear, and exactdescription of the invention, suchas will enable others skilled in theart towhich it appertains to make and use the same.

This invention relates to switches or connections for coupling thesections of a line wire used in connection with telephones ortelegraphs; and it consists in the novel construction and combination ofthe parts herel inafter fully described and claimed.

In the drawings, Figure l is a longitudinal section through a switch orycoupling constructed according to this invention. Fig. 2 is across-section through the switch, taken on the line -w in Fig. l. Fig. 3is a longitudinal section through the switch taken on the line in IS`ig. 2.

A and B are two sections of an electric line wire, such as a telephoneWire, and the switch is provided so that these sections can bedisconnected at will, for instance when a thunderstorm is impending.

C is a metallic case which is preferably cylindrical, and c isinsulating material in- 'elosing the said case. One wire section A iseoiinected to one end of this case which is closed, and D D are two fiatcontact springs secured upon opposite sides ot' the other and open endoit' the case and extending With-- in it. Q

l) isy` a pin securedrcrosswise inl the case and arranged in the spacebetween v,the free :ends ot theii'springs andthe closed end ot the case.v f

if is a lat ineta'ilic bar having a hoolef at l one end, and,having theother wire section B "secured toits other end.

(l (l are two narrow curved springs secured to the opposite edges of thebar F, at the, niiddie` part ot its length, l,with theirI tref( endsprojecting toward` theifook. 'llhe end pin-tion ot` the barliiadjacenttothe lwire is inelose'il in insulating material (j.

'lhe end portion ot thebar beyond Lhe'hook Specification of LettersPatent.

Application filed May 12, 1911.

PatentedJan. 9, 1912.

serial No. 626,804.

is tapered and rounded over, so that when the bar is thrust between thecontact springs D into the case, the hook slips into engage- Vment withthe pin E. The insulating nia-- terial prevents the current from flowingfrom the wire sections through the hands in operating the switch. Thehook is disengaged by pushing it farther Within the case and thentilting the bar F against the pressure of one of the springsGrsuiiiciently to enable the hook to be withdrawn past the pin. Thesprings Gr normally bear against the case and prevent the bar F fromtilting accidentally, and the contact springs D bear against thetlatsides of the bar and guide it into engagement with the pin and alsoinsure a satisfactory contact for the passage of the electric currentfrom one Wire section to the other. The springs G Work in the spaces inthe case' between the contact springs D.

1. The combination, With two line Wire sections, of a case secured toone section and provided with a pair ot contact 'springs and a pinarranged crosswise of the case, a bar secured to the other wire sectionand provided with a hook for engaging with the said pin when thrust intothe case between the contact springs, and springs secured to the edgesof the said bar and bearing against the case. l

2. The v:oinbinat-ion, with two line Wire sections, of a case having oneend secured to one section and having a pair of flat contact springsprojecting within it from its other end, said casing having also a pinarranged crosswise of it, a flat bar secured to the other wire sectionand provided with a hook for engaging with the said pin when thrust intothe case between the contact springs, and springs secured to the edgesof the said bar and bearing against the case and working in the spacesbetween the said contact springs.

In testimony whereof I have affixed my signature in the presence ot twowitnesses.

. v J A M ICS ERL DU VAL.

Witnesses O. (l. Rosa, JoiiN licnn.

